T491D336M016AS Equivalent & Substitute Parts

Part Overview

The T491D336M016AS is a 33 µF molded tantalum capacitor manufactured by KEMET, rated for 16 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure production availability, and support long-term system reliability.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	16 V
Tolerance	±20%
Package / Case	2917 (7343 Metric)
Type	Molded Tantalum
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
ESR (Equivalent Series Resistance)	800 mOhm
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the T491D336M016AS are classified based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following core parameters:

Mandatory Matching Parameters:

Capacitance: 33 µF
Voltage Rating: 16 V
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 125°C
Type: Molded Tantalum

Allowable Variation Parameters:

Tolerance: ±20% (primary specification); ±10% acceptable as upgrade
ESR: 800 mOhm (primary specification); lower values acceptable; higher values require evaluation
Manufacturer: KEMET, KYOCERA AVX, Vishay Sprague
Packaging Format: Bulk or Tape & Reel (TR)
Product Status: Active preferred; obsolete acceptable if electrically identical

Substitutes are grouped into three categories: Direct Equivalents (identical electrical and mechanical specifications), Upgrades (improved tolerance or performance characteristics), and Similar Parts (minor parameter variations within acceptable engineering tolerances).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR (mOhm)	Package	Product Status	RoHS Status
T491D336M016AS	KEMET	33 µF	16 V	±20%	800	2917	Obsolete	RoHS non-compliant
T491D336M016AT	KEMET	33 µF	16 V	±20%	800	2917	Active	ROHS3 Compliant
T493D336K016BH6410	KEMET	33 µF	16 V	±10%	800	2917	Active	RoHS non-compliant
TAJD336M016RNJ	KYOCERA AVX	33 µF	16 V	±20%	900	2917	Active	ROHS3 Compliant
293D336X0016D2TE3	Vishay Sprague	33 µF	16 V	±20%	700	2917	Active	ROHS3 Compliant
TAJD336M016H	KYOCERA AVX	33 µF	16 V	±20%	900	2917	Active	RoHS non-compliant
TAJD336M016HNJ	KYOCERA AVX	33 µF	16 V	±20%	900	2917	Active	RoHS non-compliant
TPSD336M016H0200	KYOCERA AVX	33 µF	16 V	±20%	200	2917	Active	RoHS non-compliant

Engineering Selection Recommendations

Direct Equivalent - Preferred Primary Substitute:

T491D336M016AT (KEMET) is the direct equivalent replacement for T491D336M016AS. This part maintains identical electrical specifications (33 µF, ±20% tolerance, 16 V, 800 mOhm ESR) and mechanical compatibility (2917 package, surface mount). The primary distinction is product status: T491D336M016AT is active and ROHS3 compliant, whereas the original part is obsolete and RoHS non-compliant. This substitution requires no circuit redesign and provides improved compliance status.

Upgrade Option - Enhanced Tolerance:

T493D336K016BH6410 (KEMET) provides improved tolerance specification (±10% versus ±20%) while maintaining all other electrical and mechanical parameters. This upgrade is suitable for applications requiring tighter capacitance tolerance. Product status is active; however, RoHS compliance status differs from the primary substitute.

Cross-Manufacturer Alternatives:

TAJD336M016RNJ (KYOCERA AVX) and 293D336X0016D2TE3 (Vishay Sprague) are functionally equivalent alternatives from different manufacturers. Both maintain the 33 µF, 16 V, ±20% tolerance specification and 2917 package format. TAJD336M016RNJ exhibits 900 mOhm ESR (100 mOhm higher than the original); 293D336X0016D2TE3 exhibits 700 mOhm ESR (100 mOhm lower than the original). Both are ROHS3 compliant and active products.

Low-ESR Variant:

TPSD336M016H0200 (KYOCERA AVX) is a low-ESR variant with 200 mOhm ESR, suitable for applications requiring reduced impedance characteristics. All other electrical and mechanical specifications remain equivalent to the original part.

Selection Criteria Summary:

For direct replacement with improved compliance: T491D336M016AT
For enhanced tolerance specification: T493D336K016BH6410
For cross-manufacturer sourcing: TAJD336M016RNJ or 293D336X0016D2TE3
For low-ESR applications: TPSD336M016H0200

Frequently Asked Questions (FAQ)

Q: Can T491D336M016AT be used as a direct replacement for T491D336M016AS without circuit modification?

A: Yes. T491D336M016AT is electrically and mechanically identical to T491D336M016AS. Both parts specify 33 µF capacitance, ±20% tolerance, 16 V rating, 800 mOhm ESR, and 2917 package format. No circuit redesign is required.

Q: What is the difference between T491D336M016AT and T493D336K016BH6410?

A: The primary difference is tolerance specification. T491D336M016AT maintains ±20% tolerance, matching the original part. T493D336K016BH6410 provides ±10% tolerance, representing an upgrade in capacitance accuracy. All other electrical parameters (capacitance, voltage, ESR, package) remain identical.

Q: Are KYOCERA AVX and Vishay Sprague parts compatible with the original KEMET specification?

A: Yes, within defined parameters. TAJD336M016RNJ (KYOCERA AVX) and 293D336X0016D2TE3 (Vishay Sprague) maintain the core electrical specifications: 33 µF, 16 V, ±20% tolerance, and 2917 package. Minor ESR variations exist (900 mOhm and 700 mOhm respectively, versus 800 mOhm original). These variations are within acceptable engineering tolerances for general-purpose tantalum capacitor applications.

Q: What does the TPSD336M016H0200 low-ESR variant offer?

A: TPSD336M016H0200 maintains all electrical specifications of the original part (33 µF, 16 V, ±20% tolerance, 2917 package) but reduces ESR to 200 mOhm. This variant is suitable for applications requiring lower impedance characteristics, such as high-frequency filtering or low-noise power supply circuits.

Q: Does packaging format (bulk versus Tape & Reel) affect electrical performance?

A: No. Packaging format affects handling, storage, and assembly processes but does not alter electrical or mechanical performance. Parts specified with Tape & Reel (TR) packaging are suitable for automated assembly; bulk packaging is suitable for manual assembly or reel-fed processes.

Q: What is the significance of RoHS compliance status in substitute selection?

A: RoHS compliance status indicates regulatory conformance for lead-free manufacturing and restricted substance limitations. T491D336M016AT and 293D336X0016D2TE3 are ROHS3 compliant, meeting current environmental regulations. The original part (T491D336M016AS) is RoHS non-compliant. For new designs or regulated applications, ROHS3-compliant substitutes are preferred.

Q: Can parts with different ESR values be interchanged?

A: ESR differences affect circuit performance in applications sensitive to impedance characteristics. For general-purpose filtering applications, ESR variations of ±100 mOhm are typically acceptable. For high-frequency or noise-critical applications, ESR specification must be verified against circuit requirements before substitution.

Q: Is the operating temperature range identical across all substitute parts?

A: Yes. All substitute parts specified in this reference maintain the -55°C to 125°C operating temperature range, matching the original T491D336M016AS specification.

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